LMFP, the New Rival to LFP: What Do Manganese-Based Batteries Promise?

Battery Technology
Author: Deniz Erkan
Creation: 20 October 2026

LMFP preserves the safety and low cost of LFP while carrying energy density up to 230 Wh/kg with a roughly 0.5 V higher voltage.

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LMFP is a modified version of lithium iron phosphate (LFP) cathode chemistry with manganese: obtained by replacing some iron atoms with manganese, it is a lithium-ion battery chemistry that offers a higher operating voltage and energy density while preserving LFP's safety and cost advantages. With a cell energy density of 180-230 Wh/kg, it sits above LFP and well below NMC, aiming to fill the gap between the two chemistries in the electric vehicle market.

Highlights

LMFP offers an operating voltage approximately 0.5 V higher than LFP.
Energy density is in the 180-230 Wh/kg range; in LFP this range is 140-180 Wh/kg.
Theoretical capacity is the same as LFP: 170 mAh/g; the gain comes entirely from voltage.
It contains no cobalt, and thanks to its olivine crystal structure it provides a longer cycle life compared to NMC.
As of 2025, Chinese manufacturers report 4,000+ cycles at 80% DoD for commercial LMFP cells.

What Is LMFP and What Does Manganese Do?

LMFP stands for lithium manganese iron phosphate; its formula is written as LiMnₓFe₍₁₋ₓ₎PO₄. To put it briefly, this is a version of LFP (LiFePO₄) in which some of the iron atoms in the cathode crystal are replaced with manganese. The manganese addition is made at the cell manufacturing stage, in variable proportions within the material formulation; it is not a parameter that can be adjusted later at the pack or system level. In other words, the proportion of manganese to be used is a decision made by the material manufacturer that synthesizes the cathode powder.

Manganese's main job is to pull the voltage upward. The Mn²⁺/³⁺ redox couple has a higher oxidation potential than the Fe²⁺/³⁺ couple, and this directly raises the cell's operating voltage. The point to note is this: LMFP's theoretical capacity is exactly the same as LFP's, 170 mAh/g. The increase in energy density comes not from capacity but from voltage. Since energy is defined as voltage times capacity, a cathode that delivers the same capacity at a higher voltage obtains more energy from the same weight.

Why does the olivine structure still hold?

Adding manganese does not change the fundamental skeleton of the chemistry. LMFP uses the same olivine crystal structure as LFP (orthorhombic Pnma space group). This three-dimensional and rigid structure limits deformation in the crystal during charge-discharge cycles. Because it is mechanically far more stable than the layered NMC cathodes, LFP's known strengths such as long cycle life and thermal safety also apply to LMFP. The difference lies not in the structure but in the metal mixture within it.

LFP, LMFP and NMC: A Comparison in Numbers

Putting the three chemistries side by side clarifies why LMFP is seen not as an intermediate solution but as a compelling option in its own right. Higher energy than LFP, better safety and lifespan than NMC - LMFP's value proposition can be summarized in these two sentences.

Property	LFP	LMFP	NMC
Energy density	140-180 Wh/kg	180-230 Wh/kg	~350 Wh/kg
Operating voltage	~3.2-3.4 V	~3.5-4.1 V (platform ~4.0 V)	High (layered structure)
Cycle life	2,000-6,000 cycles	2,000-3,000 cycles	800-2,000 cycles
Electronic conductivity	10⁻⁹ S/cm	10⁻¹³ S/cm	10⁻³ S/cm
Cobalt / rare metal	Does not contain	Does not contain	Contains cobalt
Thermal safety / cost	High / low	High / low	Relatively low / high

The ratio regarding the energy density difference in the table varies depending on the definition: values between 10% and 20% are given, and this difference depends on the manganese content of the cell. Note NMC's high conductivity in the table; this figure is also a summary of the manufacturing challenges we will cover in the next section. LMFP's 10⁻¹³ S/cm value is significantly worse than both of its rivals and cannot be used without serious engineering measures.

Manufacturing Challenges: Why Is the Mn/Fe Balance Critical?

Manganez enerji yoğunluğunu artırırken kinetiği bozar; demir ise stabilite sağlar, işte LMFP'nin kaderi bu iki elementin oranında gizli.

The distance between LMFP's advantages on paper and the realities of mass production stems from four fundamental technical problems:

Low electronic conductivity: As the manganese content increases, conductivity drops even further, making it harder for electrons to move within the cathode.
Slow lithium-ion diffusion: The movement speed of ions within the crystal structure decreases, which leads to performance loss at high currents.
Manganese dissolution: During cycles, manganese can dissolve from the electrode through a reaction called disproportionation; this is one of the main mechanisms of capacity loss.
Jahn-Teller and polaron distortions: The electronic structure of the Mn³⁺ ion causes local distortions in the crystal and slows down electrode kinetics.

The result of all this is an equation that must be solved in material design: manganese increases energy density but disrupts electrode kinetics; iron provides stability and fast charging capability. For this reason, the Mn/Fe ratio is one of the most critical design decisions for LMFP. While higher manganese content promises higher energy, it puts the cell's fast-charging behavior and lifespan at risk.

Solution approaches

Today's commercial LMFP materials overcome these problems with two fundamental technologies. The first is reducing the cathode particles to the nanoscale: a shorter diffusion path compensates for slow ion movement. The second is carbon coating: wrapping the particle surface with a conductive carbon layer overcomes low electronic conductivity. Carbon coating and ion doping are considered practically mandatory today, and with these methods, cycle life has been made to exceed 2,000 cycles.

Two methods are used on the synthesis side: solid phase and liquid phase. Solid phase synthesis is simpler and cheaper; liquid phase synthesis is more complex but produces a more homogeneous material and stands out as the preferred method for high-performance LMFP. In addition, LMFP is also used by blending it with cathodes that have a similar voltage profile to NMC (the blend approach); these blends aim to improve NMC's safety profile and are the subject of attempts to combine the strengths of both materials in a single electrode.

Which Vehicles Use LMFP?

The segment LMFP is targeting is clear: mid-range electric vehicles where energy density is insufficient for LFP, while NMC weighs too heavily in terms of cost and safety. For long-range platforms - the segment targeting a range of 500-1,000 km - this chemistry is seen as a natural candidate. Cold climate markets also stand out; LMFP's low-temperature performance is assessed to be better than LFP's.

The signals from manufacturers point in the same direction. BYD's founder Wang Chuanfu announced LMFP as LFP's successor back in 2014; CALB introduced an LMFP cell with an energy density of 180 Wh/kg at pack level in 2022; Gotion unveiled an LMFP battery with a range target of 1,000 km and announced LMFP cells reaching NMC-level energy density. These cells are expected to go primarily into mid-range EV models in China. Apart from the battery, the standard range Model 3 continues to use LFP in vehicles like this; in other words, LMFP has not yet replaced LFP and is positioned as an additional layer opening toward the upper segment.

How ready is the supply side?

There is also movement in materials manufacturing: Integrals Power's LMFP cathode active materials passed the 1,000-cycle threshold in QinetiQ tests; Mitra Chem began shipping commercial cathode material samples to global customers. In contrast, the assessment on the industrial battery side is more cautious: it is emphasized that LMFP is not yet a compromise-free technology, that safety and reliability must be verified before industrial use, and there is no sign among suppliers of rushing to market. This gap between Chinese manufacturers reporting 4,000+ cycles at 80% DoD in commercial cells and the approach awaiting verification in industrial applications sums up the technology's current maturity level well.

LMFP's Position Against Solid-State and Sodium-Ion

LMFP is entering not an empty field, but a competitive one. Its position on the energy density axis is clear: sodium-ion cells have reached ~175 Wh/kg; LFP is at ~205 Wh/kg, and nickel-based lithium chemistries are at the ~255 Wh/kg level. LMFP, which can reach up to 230 Wh/kg, is clearly superior to sodium-ion in energy density. However, sodium-ion has its own advantages: being cobalt-free, the abundance of its raw materials, and cold weather performance. In other words, LMFP will compete in the mid-segment where energy density is sufficient, and with sodium-ion in the lower segment where cost and cold are decisive.

The picture is different on the solid-state side. Geely has confirmed that it will complete production of its first full solid-state battery pack in 2026; solid-state technology promises high energy density and long lifespan. This is a development that will push the upper limit of LMFP upward - but solid-state's cost and production scale will determine how much it narrows LMFP's potential market in the coming years. In the short and medium term, LMFP serves as a pragmatic bridge technology because it is compatible with existing production infrastructure: since the olivine structure and phosphate chemistry come from the same family as LFP, manufacturers can increase energy density while largely keeping their existing cell lines.

Assessment: Is LMFP the Next Step?

Let's summarize the measurable picture. LMFP offers a 10–20% energy density increase and a ~0.5 V voltage rise while largely preserving LFP's safety, cycle life, and cost advantages. Staying away from cobalt and rare metals keeps supply chain risk low compared to NMC. Market projections also point to growth: the global cathode market covering LFP and LMFP together is forecast to rise from USD 15.1 billion in 2025 to USD 47.3 billion in 2035. (Note that these projections vary depending on the cathode definition; some reports contain far more aggressive figures because they measure cell and cathode levels separately.)

On the other hand, technical obstacles are still on the table. Low conductivity, manganese dissolution, and degraded electrode kinetics are problems that must be solved anew with every new generation of LMFP. The current realistic reading is this: LMFP is not a replacement for LFP, but an evolutionary step that extends it toward the upper segment - it is expected to appear increasingly in mid-range, long-range electric vehicles in the coming years, but industrial-scale adoption requires the completion of safety and lifespan validations.